We expected Arsenal to learn from their previous mistakes after finishing second in the league for two seasons in a row, but the squad was not ready to take their opportunities last season when Manchester City, who normally dominate the league, were not in top form. Liverpool won the league title this season with 84 points, but it wasn't enough for the league dominating team. Arsenal did not play to their full strength, otherwise, last season may have been their best chance to win the title. If Manchester City were in top form, I doubt they would win the league with 84 points.
However, predicting what will happen next season will be tough because every team is active in the market, signing top players who can improve their performance the next season. If Manchester City can return to winning ways at the start of the next season, it will be difficult for Arsenal or Liverpool to win the league, however, if Manchester City performance remains as poor as it was last season, Arsenal may be able to win the league if they can compete throughout the season.
Should we always call Arsenal always ended up at second place like three season a mistake ? I don't see it as a mistake because I don’t think Arsenal could have performed any better than they have over the past three seasons. Arsenal simply didn't have the squad to win the Premier League, which is why they’ve been struggling to win it. Even with their efforts, they still ended up in second place.
It is true that last season Manchester City wasn’t in great form, but Liverpool was in excellent form, so it was a challenge for Arsenal to win the league. What has really been affecting Arsenal is that they don’t have adequate replacements for their key players. Once one or two of their star players are injured, they begin to lose form, and that has been their issue over the past three seasons.
If Arsenal is able to sign the players they are aiming for, even if Manchester City is in form, it is still possible for Arsenal to win the league. The reason why Manchester City has been dominating the Premier League is because other teams, including Arsenal, haven’t had squads as strong as theirs. But currently, both Liverpool and Arsenal are making serious efforts to sign great players, so they can strengthen their squads. Arteta is a great coach, and if he is able to sign the necessary players, Arsenal's squad could be as strong as Manchester City.